Choose the right words to complete the sentences.

1. Computers and the Internet are two fascinating developments/inventions of modern world.
2.According to Asimov, a robot must not do anything that conflicts/argues/fights with the three Laws of Robotics.
3. It is only a matter of time before there are robots that cook and clear/clean in every home.
4.These days it is quite ordinary/common for children as young as eight to have a mobile phone.